Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac2559dcd101ff8…

MALICIOUS

PDF

23.5 KB Created: 2021-06-05 09:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2e58a240bf18c084b42c4df9c341b710 SHA-1: 7abc205ed0fda488447c91bdc9c5a5952cf85c17 SHA-256: 7ac2559dcd101ff83ccb11f62e536d3e85b97aca3b15bc52aa0c3ab84b3a63d2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing campaigns. It contains a single embedded URL that points to a URL shortener, likely to obscure the final destination. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1050

Heuristics 3

  • Image-only PDF lure links through URL shortener high PDF_IMAGE_LURE_SHORTENER_LINK
    PDF is image-heavy with little real text and its clickable action points to a URL shortener. This is a high-confidence credential-phishing carrier shape: the visible page is a screenshot-like prompt while the destination is hidden behind redirect infrastructure.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 23 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://joid.page.link/2iUZ In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://www.fonts.comMicrosoftIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2C 6180 bytes
SHA-256: 56a52b815ab1d3320d2b86f77abd9fd9ddb7ef0bf6f0425b132bd10f1381ab15

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